Vasovagal syncope
ICD-10 R55 · ICD-11 MG45.Z
Vasovagal Syncope in Patients Over 40 with Documented Asystolic Pauses
This protocol targets a specific higher-risk presentation of vasovagal syncope: patients aged over 40 years with recurrent, unpredictable syncopal episodes and documented evidence of significant asystolic pauses.
Clinical scenario
- Age over 40 years
- Spontaneous documented symptomatic asystolic pause(s) >3 s, or asymptomatic pause(s) >6 s due to sinus arrest or AV block
- Cardioinhibitory carotid sinus syndrome
- Tilt-induced asystolic response
- Clinical features of adenosine-sensitive syncope
- Recurrent frequent unpredictable syncope
Treatment approach
The structured approach begins with patient education and lifestyle modifications applicable to all patients in this group — covering diagnosis explanation, trigger avoidance, and recognition of prodromal symptoms.
Clinical goal: Reduction of syncopal recurrences.
References
DOI: 10.1093/eurheartj/ehy037
- Cardiac pacing should be considered to reduce syncopal recurrences in patients aged >40 years, with spontaneous documented symptomatic asystolic pause(s) >3 s or asymptomatic pause(s) >6 s due to sinus arrest, AV block, or the combination of the two.
- Cardiac pacing should be considered to reduce syncope recurrence in patients with cardioinhibitory carotid sinus syndrome who are >40 years with recurrent frequent unpredictable syncope.
- Cardiac pacing may be considered to reduce syncope recurrences in patients with tilt-induced asystolic response who are >40 years with recurrent frequent unpredictable syncope.
- Cardiac pacing may be considered to reduce syncope recurrences in patients with the clinical features of adenosine-sensitive syncope.
- Explanation of the diagnosis, the provision of reassurance, and explanation of the risk of recurrence and the avoidance of triggers and situations are indicated in all patients.
- Increased intake of oral fluids is also advised.
- Salt supplementation at a dose of 120 mmol/day of sodium chloride has been proposed.